US11031182B2ActiveUtilityA1

Dielectric ceramic composition, electronic device, and multilayer ceramic capacitor

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Assignee: TDK CORPPriority: Jan 31, 2018Filed: Jan 22, 2019Granted: Jun 8, 2021
Est. expiryJan 31, 2038(~11.6 yrs left)· nominal 20-yr term from priority
Inventors:Kosuke TakanoMomoyo SasakiToshihiko Kaneko
H01G 4/1227H01G 4/1236C04B 2235/76C04B 2235/662C04B 2235/761C04B 2235/3248C04B 2235/658C04B 2235/6562C04B 2235/3275C01G 25/006C04B 2235/3205C04B 2235/3279H01G 4/1218C04B 2235/6565C04B 2235/5445C04B 2235/327C04B 2235/3241C04B 35/64C01P 2002/72C04B 2235/6567C04B 2235/79C04B 2235/768C04B 35/638C04B 2235/3229C04B 2235/5454C04B 2235/3262C04B 2235/3244C04B 2235/3239C04B 2235/3225C04B 2235/3224C04B 2235/3215C04B 2235/3213C04B 2235/3208C04B 2235/3206C04B 35/4682C04B 35/462C01G 23/006C04B 2235/3409C04B 2235/3203H01G 4/008H01G 4/30C04B 2235/3256C04B 2235/3227C04B 35/49C04B 2235/3272C04B 2235/3287H01G 4/1245C04B 2235/3217C04B 2235/3258
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Claims

Abstract

A dielectric ceramic composition includes a main component of a perovskite type compound represented by a general formula of ABO3, in which A is an element in an A-site, B is an element in a B-site, and O is an oxygen element. A includes Ba. B includes Ti and Zr. A sintered-body lattice volume obtained by X-ray diffraction method is 64.50 Å3 or above.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A dielectric ceramic composition comprising a main component of a perovskite type compound represented by a general formula of ABO 3 , in which A is an element in an A-site, B is an element in a B-site, and O is an oxygen element,
 wherein A includes Ba and optionally at least one of Ca and Sr, 
 B includes Ti, Zr, and Hf, 
 98.0 parts by mol to 100 parts by mol of Ba are contained in the dielectric ceramic composition, in which a total of Ba, Ca, and Sr in the dielectric ceramic composition is 100 parts by mol, 
 90.0 pails by mol to 99.0 parts by mol of Ti are contained in the dielectric ceramic composition, in which a total of Ti, Zr, and Hf in the dielectric ceramic composition is 100 parts by mol, and 
 a sintered-body lattice volume obtained by X-ray diffraction method is 64.50 Å 3  or above. 
 
     
     
       2. The dielectric ceramic composition according to  claim 1 , wherein a sintered-body lattice volume obtained by X-ray diffraction method is 64.68 Å 3  or above. 
     
     
       3. The dielectric ceramic composition according to  claim 2 , wherein A includes Ca. 
     
     
       4. The dielectric ceramic composition according to  claim 1 , wherein a sintered-body lattice volume obtained by X-ray diffraction method is 65.34 Å 3  or below. 
     
     
       5. An electronic device comprising the dielectric ceramic composition according to  claim 1 . 
     
     
       6. A multilayer ceramic capacitor comprising a capacitor element body where inner-layer dielectric layers and inner electrode layers are laminated alternately,
 wherein the inner-layer dielectric layers are composed of the dielectric ceramic composition according to  claim 1 .

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